Update README.md

Author: XceedBoucherS

README.md

@@ -173,6 +173,8 @@ A commercial license can be purchased at [Xceed](https://xceed.com).
 
 ## Release history
 
+* **August 22, 2022 v4.4.0 released with [17 bug fixes and improvements](../../wiki/Improvements-in-v4.4.0).**
+* May 14, 2022, released v4.4 of the [Plus Edition](../../wiki/Xceed-Toolkit-Plus-for-WPF) released with [26 bug fixes and improvements](../../wiki/Improvements-in-v3.5.0#Plus440).
 * **March 25, 2022 v4.3.0 released with [32 bug fixes and improvements](../../wiki/Improvements-in-v4.3.0).**
 * February 4, 2022, released v4.3.1 of the [Plus Edition](../../wiki/Xceed-Toolkit-Plus-for-WPF) released with [46 bug fixes and improvements](../../wiki/Improvements-in-v3.5.0#Plus431).
 * **December 2, 2021 v4.2.0 released with [18 bug fixes and improvements](../../wiki/Improvements-in-v4.2.0).**